#include "request.pb.h"
#include "muduo/proto/codec.h"
#include "muduo/proto/dispatcher.h"

#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"

#include "muduo/net/TcpClient.h"
#include "muduo/base/CountDownLatch.h"
#include "muduo/net/EventLoopThread.h"
#include <iostream>
#include <string>

class Client
{
public:
    typedef std::shared_ptr<bit::TranslateResponse> TranslateResponsePtr;
    typedef std::shared_ptr<bit::AddResponse> AddResponsePtr;

    Client(std::string ip, int port)
        : _latch(1),
          _client(_loop.startLoop(), muduo::net::InetAddress(ip, port), "client"),
          _dispatcher(std::bind(&Client::onUnknownMessage, this, std::placeholders::_1,
                                std::placeholders::_2, std::placeholders::_3)),
          _codec(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher, std::placeholders::_1,
                           std::placeholders::_2, std::placeholders::_3))
    {
        _dispatcher.registerMessageCallback<bit::TranslateResponse>(std::bind(&Client::onTranslate, this,
                                                                              std::placeholders::_1,
                                                                              std::placeholders::_2,
                                                                              std::placeholders::_3));
        _dispatcher.registerMessageCallback<bit::AddResponse>(std::bind(&Client::onAdd, this,
                                                                        std::placeholders::_1,
                                                                        std::placeholders::_2,
                                                                        std::placeholders::_3));
        _client.setConnectionCallback(std::bind(&Client::onConnection, this, std::placeholders::_1));

        _client.setMessageCallback(std::bind(&ProtobufCodec::onMessage, &_codec, std::placeholders::_1,
                                             std::placeholders::_2, std::placeholders::_3));
    }

    void add(int num1, int num2)
    {
        bit::AddRequest req;
        req.set_num1(num1);
        req.set_num2(num2);
        send(&req);
    }

    void translate(const std::string &msg)
    {
        bit::TranslateRequest req;
        req.set_msg(msg);
        send(&req);
    }

    void connect()
    {
        _client.connect();
        _latch.wait();
    }

private:
    bool send(const google::protobuf::Message *message)
    {
        if (_conn->connected())
        {
            _codec.send(_conn, *message);
            return true;
        }
        return false;
    }

    void onUnknownMessage(const muduo::net::TcpConnectionPtr &conn,
                          const MessagePtr &message,
                          muduo::Timestamp)
    {
        LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
        conn->shutdown();
    }

    void onTranslate(const muduo::net::TcpConnectionPtr &conn,
                     const TranslateResponsePtr &message,
                     muduo::Timestamp)
    {
        std::cout << "翻译结果：" << message->msg() << std::endl;
    }

    void onAdd(const muduo::net::TcpConnectionPtr &conn,
               const AddResponsePtr &message,
               muduo::Timestamp)
    {
        std::cout << "相加结果：" << message->result() << std::endl;
    }

    void onConnection(const muduo::net::TcpConnectionPtr &conn)
    {
        if (conn->connected())
        {
            _latch.countDown();
            _conn = conn;
        }
        else
        {
            _conn.reset();
        }
    }

private:
    muduo::CountDownLatch _latch;       // 实现同步
    muduo::net::EventLoopThread _loop;  // 异步循环处理线程
    muduo::net::TcpClient _client;      // 客户端
    muduo::net::TcpConnectionPtr _conn; // 客户端对应的连接
    ProtobufDispatcher _dispatcher;     // 请求分发器
    ProtobufCodec _codec;               // 协议处理器
};

int main()
{
    Client client("127.0.0.1", 8080);
    client.connect();

    client.add(5, 6);
    client.translate("hello");

    sleep(1);
    return 0;
}
